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authorChad Versace <[email protected]>2017-09-12 15:52:03 -0700
committerChad Versace <[email protected]>2017-09-13 09:49:27 -0700
commit5c98d3825ccbed9054a1bb2de607116b2b31d48b (patch)
tree08eb6cc0beb3e572b48d28f59977a878646a412b /.gitattributes
parentc8db134e4deed596a67d9daa1827feca76d5c4c4 (diff)
util: Query build-id by symbol address, not library name
This patch renames build_id_find_nhdr() to build_id_find_nhdr_for_addr(), and changes it to never examine the library name. Tested on Fedora by confirming that build_id_get_data() returns the same build-id as the file(1) tool. For BSD, I confirmed that the API used (dladdr() and struct Dl_info) is documented in FreeBSD's manpages. This solves two problems: - We can now the query the build-id without knowing the installed library's filename. This matters because Android requires specific filenames for HAL modules, such as "/vendor/lib/hw/vulkan.${board}.so". The HAL filenames do not follow the Unix convention of "libfoo.so". In other words, the same query code will now work on Linux and Android. - Querying the build-id now works correctly when the process contains multiple shared objects with the same basename. (Admittedly, this is a highly unlikely scenario). Cc: Jonathan Gray <[email protected]> Reviewed-by: Matt Turner <[email protected]> Reviewed-by: Emil Velikov <[email protected]>
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